Abstract
After treatment of spermatozoa of Phryne cincta from a Berlin population (bs) with low crossing-over and from an Alpine population (as) with high crossing-over frequency, egg mortality was ascertained and chromosomal mutation rate determined by examination of the polytene chromosomes of the F1 progeny. — The as stock exhibits a 1.33 times greater radiation sensitivity than the bs stock, both in chromosomal mutation and in egg mortality rates. There is no evidence that factors other than structural ones account for the differences in radiation sensitivity. From inversion length measurements, it was proposed that a reduction of the spiral diameter of the paternal pronucleus chromosomes is responsible for a higher site number and thereby for a greater radiation sensitivity.
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Dedicated to Prof. Dr. B.E. Wolf, initiator of this work, in honour of his 70th birthday on September 27, 1978
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Israelewski, N. The relation of radiation sensitivity to pronuclear chromosome structure. Chromosoma 70, 263–276 (1979). https://doi.org/10.1007/BF00288411
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DOI: https://doi.org/10.1007/BF00288411